Felling A Tree; Felling Backcut - SNOWJOE SUNJOE SWJ807E Manual Del Operador

Basic Cutting Procedures
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WARNING!
Do not cut limbs or trees that are larger
than the maximum cutting thickness.
• Practice cutting a few small logs using the following
techniques to get the feel of using the saw before you
begin a major sawing operation.
• Take the proper stance in front of the wood with the saw
turned off (Fig. 15).
• Squeeze the trigger and let the chain accelerate to full
speed before entering the cut.
• Hold the saw with both hands firmly. Always keep your left
hand on the front handle and your right hand on the rear
handle so that your body is to the left of the chain line.
• Keep the unit running the entire time you are cutting,
maintaining a steady speed.
• Let the chain do the work; exert only light downward
pressure. If you force the cut, damage to the bar, chain, or
unit can result.
• Do not put the pressure on the saw at the end of the cut.
• Always cut with both feet on solid ground to prevent
falling.
• Do not cut above chest height since it is difficult to control
kickback forces with a saw held high.

Felling a tree

• When bucking and felling are performed by two or more
people at the same time, the felling operation should be
separated from the bucking operation by a distance of at
least twice the height of the tree being felled. Trees should
not be felled in a manner that would endanger any person,
strike any utility line or cause any property damage. If the
tree does make contact with any utility line, the company
should be notified immediately.
• The chain saw operator should keep on the uphill side of
the terrain as the tree is likely to roll or slide downhill after
it is felled.
• An escape path should be planned and cleared as
necessary before cuts are started. The escape path should
extend back and diagonally to the rear of the expected line
of fall as illustrated (Fig. 27).
Fig. 27
• Before felling is started, consider the natural lean of the
tree, the location of larger branches and the wind direction
to help you judge which way the tree will fall.
• Remove dirt, stones, loose bark, nails, staples and wire
from the tree.
Notching undercut
Make the notch 1/3 the diameter of the tree, perpendicular to
the direction of falls as illustrated (Fig. 28).
Fig. 28
2 in. (50 mm)
Make the lower horizontal notching cut first.
This will help to avoid pinching either the saw chain or the
guide bar when the second notch is made.

Felling backcut

• Make the felling back cut at least 2 in. (50 mm) higher than
the horizontal notching cut as illustrated (Fig. 28). Keep
the felling back cut parallel to the horizontal notching cut.
Strategically position the felling back cut so that enough
wood is left to act as a hinge. The hinge wood keeps the
tree from twisting and falling in the wrong direction. Do not
cut through the hinge.
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